Apparatus for making paper tubes.



G. F. JENKINS.

MDPARATUS PoR MAKINGPAPBR TUBES.

APPLICATION FILED MAY 18, 1909.

Patented DeG.24,1912.v

n//r/ //f/////////////` Zhilillll UNITED STATES PATENT oEEioE.

CHARLES FRANCIS JENKINS, 0F WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNORTO SINGLE SERVICE PACKAGE CORPORATION OF AMERICA, 0F NEW YORK, N. Y., A

CORPORATION OF' NEW JERSEY.

Specification of Letters Patent.

Patented Dee. 24, 1912.

Application filed May 18, 1909. Serial No. 496,743.

To all whom it may concern:

Be it known that I, CHARLES F RANCIS JENKINS, a citizen of the UnitedStates, residing at IVashington, in the District of Columbia., haveinvented certain new and useful Improvements in Apparatus for MakingPaper Tubes, of which the following is a specification, reference beinghad therein to the accompanying drawing.

This invention relates to making paper t-ubes by winding superposedst-rips spirally,

and particularly to coating or impregnating the interior of such tubeswith waterproofing material or the like while the tube is being formedand at the same time constantly lubricating the surface of the mandrel.Thematerial usually employed is liquid paraffin, the same beingordinarily, but` not necessarily, liquelied by heat. Such .e tubes arecommonly formed by winding strips upon a hollow mandrel, and inaccordance with this invention the treating liquid is supplied t0 theinterior of the tube through one or more openings in the wall of thehollow mandrel.

In the accompanying drawings, Figure 1 is an axial sectional elevationof a portion of a hollow mandrel with its support and with my devices inoperative osition. Fig. 2 is a. plan view of the same evices. Fig. 3 isa bottom planview ofa portion of the mandrel seen in the other figures.

In these views, A represents a tubular mandrel Xed in a rigid frame orsupport B.

C designates a suitable tank, preferably Yabove the pla-ne of themandrel, for containing paraffin, for example. From the tank a pipe Dcontrolled by a valve E leads into the interior of the mandrel anddelivers the contents of the tank through a slot. F in that portion ofthe mandrel wall upon which strips G, H of paper are wound, the slot Fbeing materially longer than the width of a strip, so that the entireinner surface of the inclined strip must pass over the slot. The stripsare usually wound by a belt, shown in dotted lines I, which draws thestrips forward around the tube, presses them together and continuouslyslides'.V the formed tube4 as these slip around aswell as along themandrel constantly presenting new surface to the slot the whole surfacewill be progressively supplied with the liquid, and. the

material so supplied will be vrubbed in under high pressure and forcedinto every pore and crevice as it will not be by simply dipping thearticle after it is formed, nor even by carefully and thoroughlyapplying the material with material advantage is that when paraffin isused it serves as a lubricant, eliminating a large part of the frictionbetween the paper and the mandrel and preventing the tearing of any thinor fragile paper which could not otherwise be used wit-h thebelt-winding machine.

In order to secure the bestresults,lwith most materials, it is desirablethat.the liquid shall "be hot, and with many materials thatthe pipeshallbe heated to preventclogging, or to liquefy material which may coolin the pipe when the apparatus is inactive. A heating burner J istherefore placed at some distance below the tank and below the open sideof a chamber K provided with a foraminous air delecting diaphragm L andhaving an outlet M immediately below the tank and controlled by anysuitable device at N, and also having an lopen branch O inclosin aportion of the pipe and preferably ittlng the interior of the mandrel.The burner, being lighted, heats the surrounding air which rises intothe chamber and .escapes through the mandrel andalso immediately belowthe tank, the total heat being controlled, as usual, by the burnervalve. Both the mandrel and the tank are thus heated, and when desiredall or anabnormal portion of the hot air may be discharged through themandrel.

What I claim is: Y

1. The combination with a hollow mandrel having a lateral opening, of atank for paraffin, a valve controlled conduit leading from the tank tosaid opening, an air heating burner, means for discharging air heated bythe burner through said mandrel and against .said tank, means forcontrolling the total heat, and means for varying the heat delivered tothe tank.

2. The combina-tion with a hollow, terminally open mandrel having a.lateralaperture between its ends, of a tank for parafa brush. Anothervery.

fin, a pipe, of less diameter than Athe inter' In testimony whereof Iaiix my signaror ofdthe mandrel, leading lfrom sai tank ture in presenceof two witnesses.

to sai aperture, an air eating evice, v

means for directing air heated by said de- OHARLES FRANCIS JENKINS' 5vice into the mandrel, and means for at Witnesses:

will varying the amount of heated air enter? J AMES S. CRAWFORD,

ing the mandrel. WM. M. BIRNEY.

